公开(公告)号：US20230128223A1

公开(公告)日：2023-04-27

申请号：US17995061

申请日：2021-03-16

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Go WATANABE

IPC: C10M169/00 ,  C10M101/02 ,  C10M105/04 ,  C10M107/02 ,  C10M111/04 ,  C10M115/08 ,  C10M135/18 ,  C10M137/08 ,  C10M137/10 ,  C10M141/10

Abstract: A grease composition may contain a base oil (A) and a urea-based thickener (B). Particles containing the urea-based thickener (B) in the grease composition may satisfy requirement (I). The base oil (A) may be a mixed base oil containing a high-viscosity base oil (A1) having a kinematic viscosity at 40° C. of 250 mm2/s to 550 mm2/s, a low-viscosity base oil (A2) having a kinematic viscosity at 40° C. of 5.0 mm2/s to 110 mm2/s, and an ultra-high viscosity hydrocarbon-based synthetic oil (A3) having a number average molecular weight (Mn) of 2,500 to 4,500 and a kinematic viscosity at 40° C. of 25,000 mm2/s to 50,000 mm2/s. The base oil (A) may have a kinematic viscosity at 40° C. of 25 mm2/s to 105 mm2/s and a viscosity index of 120 or more. Both low-temperature characteristics and a lubricating life can be achieved.

公开(公告)号：US20190300814A1

公开(公告)日：2019-10-03

申请号：US16469302

申请日：2018-01-17

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Akihiro SHISHIKURA ,  Tomonobu TAKADA ,  Hiroki SEKIGUCHI ,  Asami KOGA ,  Go WATANABE ,  Harutomo IKEDA

IPC: C10M169/00 ,  C10M101/02 ,  C10M125/10 ,  C10M133/42 ,  C10M129/08 ,  C10M117/06 ,  C10M117/02 ,  C10M141/06

Abstract: Provided is a grease composition which is excellent in fire extinguishing performance without water and can suppress fuming, malodor, and liquefaction on burning and a method for producing the grease composition.A grease composition contains a base oil (A), a thickener (B), and a fire retardant (C), wherein the base oil (A) contains a base oil (A1) having a 40° C. kinematic viscosity of 300 mm2/s or more, a sulfur content of 20 ppm by mass or less, and an initial boiling point of 400° C. or higher, the fire retardant (C) is at least one of aluminum hydroxide (C1) and 1,3,5-triazine-1,3,5 (2H, 4H, 6H)-tris(ethanol) (C2), and a content of the fire retardant (C) is 1.0 to 12.0 mass % based on a total amount of the grease composition.